package com.ui.zhixiao.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ui.zhixiao.domain.Dish;
import com.ui.zhixiao.domain.DishFlavor;
import com.ui.zhixiao.dto.DishDto;
import com.ui.zhixiao.mapper.DishMapper;
import com.ui.zhixiao.service.DishFlavorService;
import com.ui.zhixiao.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper,Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增学习教程，同时保存对应的年级数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存学习教程的基本信息到菜品表dish
        this.save(dishDto);

        Long dishId = dishDto.getId();//学习教程id

        //学习教程的适用年级
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());

        //保存学习教程的适用年级数据到学习教程的适用年级表dish_flavor
        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 根据id查询学习教程信息和对应的年级信息
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id) {
        //查询学习教程基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前学习教程对应的年级信息，从dish_flavor表查询
        //条件构造器
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        //查询条件
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);

        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前学习教程对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的年级数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();
        //遍历flavors
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }
}